Plastic rolling machine



P 3 e. K. BAINBRIDGE 1,824,759

7 PLASTIC ROLLING MACHINE Filed May 24, 1930 2 Sheets-Sheet 1 n n @F h fi u)\ Q lNVENTOR G. K Bain brafga ATTORNEY" Sept. 29, 1931. K BAlNBRlDGE 1,824,759

PLASTIC ROLLING MACHINE Filed May 24, 1930 2 Sheets-Sheet 2 Fig.2

I 1 13 g i 7 y 7 II N j n r L /"'h. Q ."r'. l 9 7 ,2 *2, 7 10 12 I] l j! I z 1 11 I 22 15 15 '1 1 2 INVENTOR G. KBainbrdl 4? BY Q E g.-

ATTORNEY Patented Sept. 29, 1931 zenonen K. nAInBRrneE, *orhnrron, CALIFORNIA was mums MAQ Application a ly e4, 1es 0.-s.e,ria1 m. 455,235.

"This-inv ention relatesto machines for rolling individual lum sofplastic material from rectangular, cyl in or other shapes nto balls. of even and substantially spherical 5 form and particularly represents'i nprovements over the structure for the same pose shown in my'Patent No. 1,303,013,; dated May 6, I919. g The major object is to provide a machine for this purpose 1n which the rolling of the lumps into a spherical form is morequickly and accurately accom 25 such structureand' relative arrangement of p r as Will ully appear. rom a p ru a of the following specificationand cla ms,

In the drawings similar characters of ref e, erence indicate corresponding parts in-theseveral v ews Fig. 1 1s as de elevation ofx y i o d rolling mach Figi a partl ly op pla iew of l e same.

F g- 8 is n n arged' rag n ar'y c oss se tion onthe line 3 3 offFig. 1;

R ring now mo e p rtic lar y th c ct f ref r n e" on. the; draw ngs, th

machine comprises transversely: pa ed. 7 19" 4 rights 1 whichSllPP rt horizontalframe er 3 a e mounted.- Aniendlessbelt passes abo t he e l ers, beltcompr s ns.

relatively narrow and heavy undeivorbase r pe and a relative y wide a d fle ible rip 1 5 secured thereonythe outer surface of the strip 5 being formed to give a'non-slipsurface preferably by means of pyramid shaped teeth 6 such as are featured in said above; I v

arrangedion a hor zontal transverse axis. V The axis of the gear 201s substantially alined 1% mentioned patent. The upper run of the belt strip 5 for the greater portion of its lengthpurof the present invention A further obj ectof the invention is to prq membe s 2 n wlh eh long tudina ly paced ismade to turn up at the sides and so as to be of concentric form andjsubstantially semicircular'in cross section, as, shown in Fig. 3 by longitudinally extending guide plates 7 haying'asimilar curvature. These plates are 55 disposed. tothe sides of the main base strip 4::L,H(1"B.IV'Q- supported from the frames 2 by suitablebrackets 8. .Saidrnain' strip 4 may ifdesired rest intermediate the rollers on a fiat memben 9supported from said frames 2, so that the main Weight and" pressure on the belt will be taken by said member andthe strip 4- rather than by. the guides and the flex.- ible strip 5; One of the rollers 3 is driven by any suitable means soaas to drive the belt.

Disposed above the guides and the correr. spending concavedportion of the belt are transversely spaced horizontal barslO which are suspended frointhe uprights 1, for transverse rockingmovement, by pivoted arms 11 5 depending from and connected to said u rights 1. These bars lsupport rollers 12 adjacent their ends, about which an endless transversely fiat belt 13 is disposed. This belt is somewhat wider than the belt below 75 when the'latter is .concaved and its outer surface is also formed with p'yraniidal teeth 14 or other neansto provide anon-slip grip on thematerial; The lower un of the beltl3 is spaced a: certain distance from the under belt 9%? or so that-it is well clearof the upper edges ofsther concaved portion of said" lower belt. The upper, belt is rocked transversely through a certain strokeand at the same time is dri'venlengthwiseby the following means. J ournaled'in a bracket; 15 secured to one of the uprights 1' outwardly ofthe same is a horizontal shaft 16 which,exte1idslengthwise ofthemachine and is adapted togbe driven by any suitablejmeans. Onone end this shaft carries a crank 'orf eccentric l7 which engages the adj acent; end of; a horizom ta], connectingrod l8 whichiextends trans-- versely of; the. 'macl1ine and. is connected, to, the adjacent belt supportingbar'lQ ata convenient, point. A bevelgear 19 fixed on the opposite .end of the shaft meshes with another bevjel gear 20- j ournaled in the bracket 1 5 and with the axis of one of the rollers 12 and is operatively connected thereto by a special shaft. The portion of this shaft nearest said roller and connected thereto is in the form of a closely wound helical spring 21, while the outer portion 22 is rigid and has a sliding but a non-turning fit in the hub of the gear 20. With the rotation of the shaft 16 the up:- per belt unit is reciprocated transversely reldriven in such'a direction that their adjacent runs both travel in the same direction. The lumps 23 tobe rolled are dropped in spaced relation onto the fiat portion of the lower belt at oneend from the spout 24 of a pressmg and measurlng machine, such as that for instance shown in 'my co-pending application for patent, Serial No. 55,237, filed May 24, 1930. It is of course necessary that the lumps or the belts shall be dusted in order to prevent the adhesion of the material thereto. This feature however has previously been recognized as being necessary and provision being made for takingcare of the same, and hence forms no part of this invention. As the lumps advance along the belt and the latter assumes a concave form, said lumps are engaged by the longitudinally andtransversely moving upper belt, which causes the lumps to be lowered up and down the concave surface, while being moved lengthwise of the same, until by the time said lumps pass beyond the upper belt they are in a substantially spherical form, as shown at The relatively great curvature ofthe lower belt as' differentiated. from the flat curve of the corresponding belt of the previous device, prevents any possibility of the lumps being squeezed or wedged between the belts toward their outer edges; while the specialform and mounting of said belt enables such great curvature to be obtained without ent No. 1,303,013, hereinbefore referred to..

This difference in drive. speeds of the belts increases the capacity ofthe machine to a material degree, as wellas avoiding the possibility of the lumps contacting with each other as they are worked between the belts. This is because the faster travel of the upper fiat belt tends to speed up'the longitudinal movement of the lumps being rolled back and forth on the lower belt. This separates the lumps relative to their initial spacing rather than retarding them as was found to readily seen that'I have produced such a device as substantially fulfills the objects of the invention as set forth herein,

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful and desire to secure by Letters Patent is: v

71. A plastic rolling machine includingupper and lower endless belts between the ad jacent runs of which the material to be rolled passes, the upper run of the lower belt along that portion of the same under the upper belt having a substantially semicircular concave form in cross section relative to the up per belt and being narrower between its side edges than the upper belt, and means to re ciprocate said upper'belt transversely.

' 2. A plastic rolling machine comprising upper and lower endless belts between the adjacent runs'of which the material to be rolledpasses; rigid frame uprights to the 'sides of the belts intermediatetheir ends and projecting above the up er belt, and rollers about which saidupper iielt passes, side sup porting bars for said rollers, arms pivoted on and depending from the uprights to and supporting said bars for transverse swinging movement, a horizontal driven shaft mounted in connection with one of the uprights and extending longitudinally of the belts. a crank connection between said shaft and the adjacent'bar, aflexibleshaft unit connected to and extending axially from one of t-herolle'rs, a gear mounted in fixed relation with the' 'first named shaft axially of the second shaft and with which the outer end of the latter has slidable driving connection,

and a gear on said first named shaft driving said first named gear. I

In test mony whereof I aflix, my signature.

I BAINBBIDGE. 

